Humidity Sensors | Digital & Analog Hygrometers

Humidity Sensors & Hygrometers

Humidity sensors provide accurate relative humidity (RH) and temperature measurements for environmental monitoring, HVAC systems, industrial processes, and weather stations. These electronic devices convert humidity levels into electrical signals for data acquisition and control applications.

Sensor Technologies

Capacitive humidity sensors offer high accuracy (±2% RH) with low power consumption, making them suitable for battery-operated devices and IoT applications. Resistive sensors provide cost-effective solutions for basic humidity detection. Digital output sensors integrate signal conditioning and calibration, delivering I2C, SPI, or analog voltage outputs for direct microcontroller interfacing.

Key Specifications

Measurement Range: 0-100% RH with temperature compensation
Response Time: 2-8 seconds for 63% step change
Operating Temperature: -40°C to +125°C depending on model
Output Options: Analog voltage (0-5V), digital (I2C/SPI), or 4-20mA
Power Supply: 3.3V to 24V DC operation

Applications

Industrial process control systems use humidity sensors to maintain optimal conditions in pharmaceutical manufacturing, food storage, and cleanroom environments. Building automation systems integrate these sensors for HVAC efficiency and indoor air quality monitoring. Agricultural applications include greenhouse climate control and soil moisture management. Weather stations and meteorological equipment rely on precision hygrometers for atmospheric data collection.

Installation & Maintenance

Mount sensors in representative locations away from direct airflow, heat sources, or condensation zones. Most capacitive sensors require periodic recalibration every 1-2 years to maintain accuracy. Protect sensor elements from dust, oils, and chemical contaminants using appropriate housings or filters. Digital sensors with built-in compensation algorithms reduce drift and extend calibration intervals.